1 definition by JacobianSmith
The sexual act where one partner acts as the 'gatekeeper' clenching his or her anus in an attempt to prevent the other partner from penetrating the anus forcefully with his member or a phallic sexual aid (dildo).
Man... Bob and I were playing gatekeeper last night and he was able to siege my stronghold in moments.
by JacobianSmith May 20, 2012