To "in" an embarrassing gay or lesbian person; the opposite of outing someone. To try to hide that they are GLBT because they are so conservative, usually employed as shock jocks or twisted journos.
"Did you hear that Alan Jones was gay?"
"Shut your mouth! We're inning that loser!"
3 strike outs in a row.
OMFG, I can't believe he did a whole inning.