SEU "Semen extraction unit". A very attractive adult, usually female, designed specifically for the purpose of extracting semen from both unsuspecting and suspecting men.
Pamela Anderson is a role model for all women aspiring to become SEU's.
by NGEOGUY March 28, 2007
1 more definition
Abbreviated or slang form of the word SERIOUSLY.
We are experiencing SEU good weather today. That joke was SEU funny!
by Logan Richmond September 02, 2005