flunk - To fail to reach the required standard in an examination, test, or course of study

ruffle - to move or lift something so that it is no longer smooth; to disorder something, typically by running one's hands through it

fret - To be constantly worried or anxious.

stoop - To bend one's body forwards and downwards

lurch - To make an abrupt, unsteady, uncontrolled movement or series of movements; stagger

antagonize - To cause someone to become hostile or angry.

evade - To avoid or escape from someone or something.

strut - To walk with a stiff, erect, and apparently arrogant or conceited gait

waddle - To walk with short steps and a clumsy swaying motion

heckle - To interrupt (a public speaker) with derisive or aggressive comments or abuse

burst - To suddenly break apart, spilling its contents, usually as a result of internal pressure.

undermine - To weaken or damage something, especially gradually or secretly; to sabotage or erode the foundation or support.