If an Australian believes you have been of great assistance to him/her in some way,for example solved a worrying problem for the person, had a positive impact on the person's life, been a true and helpful friend to that person, or done something of a significant positive nature for that person then he/she may show his/her very great appreciation for your help by telling you "Mate (or your name), your blood's worth bottling". Generally it is a special compliment only handed out for some personal contribution by you that the person believes is of particular significance to him/her. It is said when other methods of showing your appreciation are not enough, where it may be difficult to put your feelings into words or where it saves you going into a long winded explanation of your feelings.

Bro since I got dirtpilled on Tuesday I have made sooo many worm friends and made them soo many little houses to get married in. Me? Lonely? No you’re the lonely one u lawn owning freak