An underwater erection, usually in a pool/social setting.
That hot lifeguard just gave me a hot look. Now I am sporting a kraken. I'll have to swim this off.
Giving away or given a gift with clear expectations of a favor or gift in return.
"I thought it was a nice sweater, but she was gribbing it to me. Now she waits for some unknown favor. I don't know how a gift got me into this.....debt. She was gribbing me. le sigh.