What is beibs in the trap?

“Beibs” (a misspelled abbreviation of Bieber’s last name) refers to cocaine, continuing the longstanding tradition of using the names of white celebrities as euphemisms for the drug. Other examples include Migos' hit “Hannah Montana” and Lil Wayne’s “White Girl.”

"The Trap" refers to a house/apt where drugs (preferably cocaine) are sold at.