Nerd you and I found in wrong bed (5)
I believe the answer is:
dweeb
'nerd' is the definition.
(I've seen this before)
'you and i found in wrong bed' is the wordplay.
'you and i' becomes 'we' (we means you and I).
'found in' is an insertion indicator.
'wrong' indicates anagramming the letters.
'bed' with letters rearranged gives 'deb'.
'we' going within 'deb' is 'DWEEB'.
(Other definitions for dweeb that I've seen before include "techie bore?" , "Geek" , "Boringly studious student" , "silly American" , "Antisocial guy" .)