Gig'em Aggies

I had to ask Kelly in my office what gig'em means after I had both seen it on a campus building wall at Texas A&M and a staff member had said it to me at the end of a chat conversation. Apparently it is a pleasantry, maybe something like "go get them." Kelly said she also thought it technically means something about catching frogs but I haven't googled that yet.

Oh and the Aggies are the members of the Texas A&M community, for agriculture.