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.