Verb: to be horny in the morning; to be mentally or physically aroused before getting out of bed. Non-gender specific term, so both men and women can engage in horning.
Look at my roommate with a huge stiffy under his sheets... he is totally horning this morning! Instead of getting out of bed in the morning, she decided to lay there a few extra minutes horning over the boy she met that weekend.
Horning - verb. The act of using a Shofar (ram's horn) to wake up, surprise, or spook an otherwise unsuspecting victim. Popularized in a viral video uploaded to the web in January 2013.
"We tried Horning Kim last night, but we laughed too much and she heard us."
"Dude, we could barely fuckin breathe after we horned Jordan last night, we were laughing so much. I think he was convulsing so hard that his synapses were fried."