What's on your mug?

Something incredibly cool, awesome, or just fucking increidble. Best used when referring to something popular in the 80's or early 90's. See: rad, bitchin.

Dude, these aviators are so boss.

By B

a friendly way to greet someone

Wud up boss?

By LoCo

If something is cool it is considered Boss.

Dude your car is so boss.

By Lil' Balthazar

Acronym for big oversized semen shooter.

Man, my BOSS is an asshole.

By Gary Coleman IV

Super cool, Awesome, Amazing. Also spelled as Baws.

'Did you see that girl Kayla over there?' 'Dude she's a boss.' 'Have you seen Sheas new haircut?' "Yeah man, it looks pretty boss on her.'

By Dudeimmaboss