Cover-up term for bisexual.
This is because of the periodic table of the chemical elements (chemistry): The 83rd element is Bismuth, which is abbreviated with "Bi".
(67 42 = Homo)
Don't tell anyone he's 83!
by yxw_str-rot13 March 24, 2009
83 is the number of god, this number is all powerful and can only be explained through god. However with such a loving powerful force comes with an evil contrary, being 38. 38 is disgusting and can be associated with the devil.
by 83gods May 21, 2019
Hetrosexual Oral Sex. Think about it - "69" would only work for M/M or F/F sex...
We were 83in' last night when her mom walked in...
by AL1EN May 31, 2006
Truly, the greatest and most profound of numbers.

A true man can only be gifted with the insight into the mysteries and wonders of this delightful digit, if they receive a prophetic dream from the one true messiah, Majestic Beard.

The church of 83 is always recruiting, and is currently looking for individuals to fill in as Bishops.

Please apply to Warisha: Lady High Priestess of 83.

To contact her, please look into your heart.
83
by Shcibby May 5, 2020
anal sex (think on the 8 as an ass & the 3 as wang)
I had 83 last night, & it hurt like hell!
by amanda June 24, 2003
Dude, that kid is so 83.

I wish she was 83.

I AM NOT 83!!!!!!
by Bi83Man November 2, 2007
Big 83
"83 EEIGHTYTHREE ON TOP"
by haydis October 25, 2019