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2 definitions by RaCeR_X

A play off of Gymnasium; any room or location where sex is going to occur.
Excuse me gentlemen, Ann & I are headed off to the Sexnasium for a late night workout.
by RaCeR_X November 01, 2012
The act of giving head, blow job, oral, eating out, etc... the word is a combination of "slurp" for sucking & "derp" for sounds being made while attempting to talk with genitalia in ones mouth.
It's that time of the month, so Jenny gave Johnny a little slurp-a-derp to calm him after his busy day.
by RaCeR_X November 22, 2013