un queue means 'a tail'
"La queue" in French means "the tail" or "the line" depending on the context.
Une queue. Used to define the tail or the waiting queue.
la queue is either an animal's tail, or the file of people queuing up.
un sac is a bag in French.
un four is an oven in French
"un bus" is a bus in French.
un survêtement is a tracksuit in French.
un crâne is a skull in French.
"un crayon" (masc.) is a pencil in French.
"J'ai un" in French translates to "I have a" in English.
That could be a phonetic transcription of "il y a un baton dans ma queue", which does not make much sense in French. One option is to translate it as "there is a stick in my d*ck" (rhyming with stick), so something weird and unappropriate.
un serpent is a snake in French.