by kristenka0s December 9, 2008

A feeling experienced by (But not limited to,) high school aged individuals on the first day of every school week (Monday).
Common symptoms include:
Lowered brain functions,
Bad Temper,
Stress,
and an overall feeling of human (Or otherwise) excrement.
Common symptoms include:
Lowered brain functions,
Bad Temper,
Stress,
and an overall feeling of human (Or otherwise) excrement.
*Jimmy wakes up*
*Jimmy sees it's Monday*
*Jimmy goes back to sleep*
Example 2
1: "Dude, I got a 57% on that test last Monday..."
2: "That's Monday Sickness for you..."
*Jimmy sees it's Monday*
*Jimmy goes back to sleep*
Example 2
1: "Dude, I got a 57% on that test last Monday..."
2: "That's Monday Sickness for you..."
by Perchant February 3, 2014

Something that is super extra awesome. This awesomeness even goes beyond gnarly. Both silly and sick are adjectives in this phrase, so you know it means buisness.
by Elib November 11, 2006

by yo March 17, 2004

by kathro gonzalez October 29, 2008

The combination of having a high BAC and motorboating a girl causing ones self to vomit on the girls breasts.
Guy 1: I can hardly remember last night... I woke up with throw up all over my face and shirt. Guess it was a productive night haha.
Guy 2: ... You threw up all over Catherine's grade A tits after she allowed you to motorboat. Must've gotten Sea Sickness dude.
Guy 2: ... You threw up all over Catherine's grade A tits after she allowed you to motorboat. Must've gotten Sea Sickness dude.
by Snicklebritz October 1, 2012
