Definition of "quickie"

We had a quickie; I didn’t come & was only telling of the future where there was better bed fucks & us living contentedly as we walked slowly across town again to her home.

1971, Neal Cassady, The First Third, City Lights, page 136

Why talk about courtly love [l'amour courtois][sic] today, in an age of permissiveness when the sexual encounter is often nothing more than a ‘quickie’ in some dark corner of an office?

2005 , Slavoj Žižek, The Metastases of Enjoyment: Six Essays on Women and Causality, Verso, page 89