* "Going blank": This is a general term that simply describes the actor forgetting their lines.
* "Drying up": This term is used when an actor suddenly forgets their lines and becomes unable to continue speaking.
* "Freezing": This term describes the actor becoming stuck and unable to continue the performance after forgetting their lines.
* "Fumbling": This term implies the actor is trying to remember their lines but struggling to do so.
It's also worth noting that actors often have their own ways of describing forgetting lines, using humorous or self-deprecating language.
Ultimately, the best term to use depends on the specific context and the way the actor handles the situation.