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A sock or rag you use to wipe up the mess after you blow a load and get a face full of cum and wetness.
I used my dog's sock as a dab towel after I came on her face and she laughed at me.
My roommate used a curtain as a dab towel after I forgot to clean up and he had to wipe his eyes.
I used my sister's shirt as a dab towel after she caught me with my buddy and I had to hide my face.