What is Birdwirp?
A small fold in a piece of material that when rubbed between finger and thumb retains its shape and often moves along the material. Usually found on denim jeans when in a sitting position.
'Birdwirping' is the act of 'Snuggling' the Birdwirp. Can be tremendously annoying for the wearer. Usually pleasurable for the 'Birdwirper'
I've found a 'Birdwirp' on your jeans. Let me 'Birdwirp' it.