Sorry to arrive so late. I was all the day out. well, you want the meaning?
Merci Sandra,
Tu sais! Lorsque tu me dis ça, tu me donne un coup de pouce.
It's a french expression which means:
"Thanks Sandra,
you know, when you say that to me, you are pushing me ahead (or giving me a power or desire or encouragement in my english)"
Strange expression if you take it literally, no?