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1.
B2B
When two men masturbate back to back.
"Hey Feta want to come over to my house for a sleepover? We can B2B," said Tim.
by mlf69247 September 05, 2013
 
2.
b2b
boner to boner; penis to penis; homoghey to homoghey
I walked in and caught Jiffy and Medi b2b so I handed them a funnel and let the sheep back outside.
by sallem March 30, 2005
 
3.
b2b
Business to Business. As in, the two parties involved in financial or business transactions, traditionally sales of goods or services.

contrast to: b2c, c2c
The Microsoft corporation does business in both b2b and b2c markets. Sun Micrososytems and Oracle (both floundering next to Microsoft) are primarily b2b focussed. While Ebay's business is mostly b2c (between Ebay the company and their users), the business they enable with their service is almost all c2c, between one user and another.
by EAHIV June 10, 2004
 
4.
b2b
Short for back to back.

1) Two DJs playing together. While one DJ is spinning a record, the other one is picking a new track. As they normally store their records behind them this usually makes the DJs face backwards on each other.

2) Business to business - there are two parties involved in financial or business transactions, traditionally sales of goods or services.
1) "The DJs at Intents Festival were amazing, especially Adaro b2b with Ran-D!"
2) "The local shop does business in b2b markets."
by DJ Medeiroz June 01, 2013
 
5.
b2b
Body to Body : As in while giving a massage to one's sexual partner, one can touch his/her body and rub the oil between them.
My girlfriend gave me a b2b massage. Man it was frickin awesome.

My gf and i were dancing b2b on the dance floor.
by DarkScribe May 06, 2013
 
6.
b2b
the act of sleeping back to back, usually with someone who wants the comforts of a bed but doesn't want to bang you.
"Man, I really don't want to share a bed with Bryant, but b2b is better than the futon."
by bryantsunnyrenee November 06, 2009
 
7.
b2b
Business to business. See also, b2c and c2c.
Marketing one's business to other businesses, rather than to consumers in general.
by Downstrike June 07, 2004