It is quite a vague sentence to tell the right meaning as it is written out of a context but to bowl may be interpreted as to serve or to strike a ball... bouncer may be a noun formed on the base of bounce (move quickly up, back, or away from a surface after hitting it) So that I suppose it means that He would like to perform a specific strike which should bounce off something(maybe with especial curve or twist... or something like that)...
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