As a true "How I Met Your Mother" fan, these words have taken on a whole new meaning. Here are 15 definitions to add to your mental dictionary.

1. Sandwiches

2. High Five

“I request the highest of fives," a very intense gesture shared by two bros. Most of the time Barney is left hanging on this one.

3. 2 a.m.

Nothing good ever happens after 2 a.m. Well, unless you are still binge-watching HIMYM. If not, get back to bed.

4. Pineapple

This is one of the greatest mysteries of all time, where did it come from?

5. Umbrella

This yellow umbrella pops up now and again with a woman hidden from her neck up only to be revealed at the show's end. One of the most anticipated moments of the entire show: the reveal of the mother.

6. Laser Tag

One of Barneys favorite things, besides hooking up with new women using moves from the playbook

7. Suit

“Suit up” another common phrase used by Barney, who believes a suit is not only for special occasions but to be worn daily, "to distinguish ourselves from the millions of T-shirt and jeans lemmings out there," Is how Barney and his brother use it as their excuse.

8. Salad

Something far from healthy, one of Marshall’s Minnesotan mother's famous recipes, consisting of cheese, funyuns, bacon bits, potato chips, gummy bears, cabbage and between each layer a whole ton of mayonnaise.

9. Intervention

The friend would hang up an intervention banner to get one member of the friend group to stop some embarrassing habit or end a dating relationship. This began to occur so much that the 5 five friends had to have an intervention for having too many interventions.

10. Professor

A word impossible for Ted to spell, although he becomes one and has to ask his students for help.

11. Legendary

A common phrase said with suspense and enthusiasm by Barney Stinson. Stinson uses this when he has some big news to share with is friends, although they rarely seem to care.

12. Slap

Behold the slap bet. Five slaps given to Marshall that he may choose to bestow on Barney at any given time, a big time being "slapsgiving.

13. Playbook

Barneys step by step instructions on getting a woman to have sex with him, and all the ones he has succeeded using.

14. Ducky

A horrendous looking tie that represents a terrible bet lost by Barney.

15. Cockroach

More commonly known to HIMYM fans as the “cockamouse," a horrifying creature stopped on multiple occasions by Marshall and Lily.