"Rabbit girl" means that the girl was born in the Year of the Rabbit. "Yin Shi" is a traditional time unit in China, representing silver moon, which is the first day of February (according to the fifth hour of the main branch time). "Tiger walks at night" may be a metaphor or symbol, indicating that girls are as energetic or fierce as tigers at night.
Please note that the explanation of this sentence is only based on the literal and common cultural background, and the specific meaning may be different due to personal, geographical and cultural backgrounds.