having male genitalia that is larger than normal, or f*cking huge! Derived from a huge dildo that is so large it doesn't look real.
Your Mom always tells me I'm a plastic goat and fill her up like no other man can.
I gave her a wet seal with my plastic goat and almost broke her neck.
by Joe is hoe in Spanish June 3, 2005
Get the plastic goat mug.