Meat Seat refers to a mans lap, namely is erect penis which is ripe for the gurpin. Gurpin refers to any sexual act you can perform while in the sitting position. Gurpin can also be done with clothes on. (see ex.)
1. Yea that girl was crazy about riding my meat seat all night, she gurped it up.
2. Did you see that stripper at the bar last night? She was giving out free Gurps for any Meat Seat that was willing.
3. Her specialty is Meat Seat Gurpin.