Term used to describe an act of sexual dirtiness. This could be used to describe an individual who sleeps with many people, or someone who has dirty sexual tendencies.
Riggers: 'Sjoberg, where have you been?'
Sjoberg: 'Slept with 4 girls in the last 24 hours - new record.'
Riggers: 'Ahhhh BDDDGBIYB!' (normally followed by high five, or similar gesture to congratulate)
BSDD also known as 'Back Stabbing Designated Driver' is referred to person who is set out to be the designated driver in a situation where his/her friend are already planned to get wasted that night. The 'BSDD' is known to get drunk first on purpose leaving him/her incapable to drive having him/her's friend out to be the new 'unplanned' designated driver leaving that person to stay sober for the rest of the night and missing out on loads of drunken fun him/her had planned for the weekend.
Brad: Sup, man. How was your birthday weekend? I know you've been waiting to get wasted allllllllll week!
Todd: I was sober all night. God damn Tommy ended up pulling a BSDD.
A word that is much similar in spelling and meaning to "Badside." This word can be used to describe something that you would normally NOT tell your parents.
It is not uncommon for someone to create a "Bdsd" account on facebook, to post pictures of them doing things they shouldn't be.
Me to friend: "You man, I smoke weed all day, and I don't give a SHHHHYYYYT".
Friend: "thats great dude."
Me: "Oh and keep that on my bdsd ok, thanks."