Woke: from civil right movement, someone who is weary of loyalty to the state and instead examines society/policy/politics himself. - in modern times used as slur against progressive and ecological conscious people by right wing people.
Tankie: Someone who is authoritarian to a degree he sees using the army (tanks) against the own civilian population as a valid and legitimate action.
Sometimes used as slur by people against those measures (or generally highly authoritarian top down approaches of state theory) or as (positive) self reference by people in favor of such measures (or generally highly authoritarian top down approaches of state theory)
Don't know what your problem is defining both.
EDIT: Not to be confused with "I know exactly who a tankie is and who isn't - my definition is 100% correct" or even "there are exact boundaries and conditions to what a tankie is"
Its like "peace", " progressive", "right-wing", different people will give you different definitions, my point is, that there is a concept to which the word refers and different interpretations/ambiguities don't render the term useless simply by existing.