cop car full-on

[krisstte]

What can be mean by "full-on" here? Police car with lighs and sirens? Thanks in advance

Tripp Ingraham has been arrested.”
“What?” I finally say, and she glances behind her at her husband.
“Matt just got a text from his friend in the DA’s office. Apparently, they found something when they did the autopsy? Or something in the house? I don’t know, but I texted Alison who lives on his street, and she said a cop car full-on showed up and took him away in handcuffs.”

R. Hawkins "The Wife Upstairs"

 

[emsr2d2]

What can be is meant by "full-on" here? Does it mean a police car with lights and sirens?
"What is meant by" isn't very natural even though it's grammatical. Generally, we say "Does XXX mean YYY?" Your question would have been more natural as:
"Does "full-on" here mean a police car with lights and sirens?


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Yes. It suggests to me a police car hurtling towards the house, siren on, lights flashing, then screeching to a halt outside and disgorging officers there to arrest him.