Go stag American old-fashioned informal
To attend a party or social event without a partner
I am not afraid to go stag to the prom. It’s not a big deal for me.
Are you going stag to your ex’s wedding?
She chose to go stag to the party because she could mingle and dance with anyone.
The verb "go" should be conjugated according to its tense.
Used to express something bad is happening again
Here we go again! Lisa has just asked to borrow my new dress.