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1.
When a guy who will most likely have no sucsses in his life returns to his hometown to crash highschool parties and takle advantage of juniors
Hey Where's Sean?
>Out at Zacks high-schooling.
Kinda sad aint it?
by naptownlove August 01, 2005
 
2.
vi. When adults, in adult situations, behave as if they were in high school - teasing, bullying, forming cliques, generally being immature.
Don't go to work at Bill's company, only two things go on over there - working and high schooling. If you do go to work there, you had better get in with the cool crowd ASAP, or you will end being pushed around and stepped on forever.
by Seb13 February 05, 2009
 
3.
v. to make out like you did in high school.
No, I didn't have sex with him. We were just high-schooling.
by Anonymous June 13, 2003