The last shot out of a bottle of liquor that is on the house. The name comes from the thought of there being a spider in the bottom of the bottle.
Some guy: I'll take a shot of whiskey.

Bartender: Looks like you got the spider. This one's on the house.
by SleepyP June 5, 2010
The last bit of a drink that is mainly backwash
I'd let you have some of my beer but all that is left is the spider
by Rackbarzee April 7, 2011
Wow, last night I walked in on Pam, Ashley, Jess, and Tommie doing The Spider.
by Tommington January 28, 2018
A contraption made from a huge water jug with 8 dildos coming off of it. It is used to pleasure random homosexuals. One person is required to hold it.
Alex pissed into the spider and the eight kids sucked on eight fake dicks all night long. They also chugged down gallons of piss.
by SJHS BOI February 3, 2005
When your girl is naked on her back and you put your thumb in her vagina and your index in her ass, you squeeze the No man's land and you pull it and she tries to follow with her legs and arms and she looks like a panicked spider.
Brian Spidered Nancy yesterday and she was pretty mad. She left him because of The spider.
by Bellieve October 15, 2018
The act of keeping your dick hard (accomplished by cupping your hand over the head and massaging your shaft with your fingers, thus resembling a spider) while masterbating in a public restroom when someone walks in until they leave.
I had to use the spider because the bathroom was busy as fuck.
by x Chewy x September 4, 2018
A contraption made from a huge water jug with 8 tubes come off of it. It is used as a funnel for beer for multiple people at a time. One person is required to hold it.
Jack held the spider and the eight kids funnelled down 24 beers at once
by Alex Torres January 6, 2004