It's the Spanglish translation for the Mexican slang expression "cagar el palo" or "cagando palo".
def. -someone who's fucking around and play jokes on people or on you. whether by killing your vibe, embarrassing you, or instigating shit.
Mainly used in South Texas (RGV)
pinche kevin kept cagging stick in Ms. Garza's class, so they had to call his parents. todo pendejo.